DeWALT DXH70CFAV 68,000 BTU Cordless Forced Air Propane Heater Stainless Steel Imported Industrial housing - Electrostatic powder-coat finish ensures long life and protection for internal components Batteries: 1 - 20V battery required (batteries and charger sold separately) Variable rate valve for optimal heat Quite Burner Technology - 50 percent quieter than a standard propane heater High temperature limit switch for added safety